Bending tool



Sept. 27, 1932. c. BREER 1,879,868

BENDINQ TOOL Filed Oct. 12, 1929 II I! II I II llllllllllllllINIIHIIIIIIIIHIIIIII mag-5555mm v INVENTOR C'AHL SHEER.

Patented Sept. 27, 1932.

Y UNITED STATES PAT-Eur our. BREER, or nn'rnorr, vrromeeiv Bmvnme TOOLApplication: filed ctober12, 1929. Seria1'No..399,220.

This invention relatesto a tool or accessory of the connection shown inmy co-pending application Serial #454,485, filed May 21,

1930 which will enabledealers to bend a has brought about thisrequirement, the main essential being that the user be able to locatethe valve stem in a position accessible for inflation purposes from theoutside of the wheel. To avoid the necessity of supplying the dealerwith two complete sets, of inner tubes and tying up capital withoutincrease of return, the present invention provides a tool for readilybending straight valve stems that have been secured to the inner tubepreviously, usually at the factory, from the straight form to an angularform, as occasion may require. It aims to provide a practical, efiicientand inexpensive tool for such bending of valve stems without requiringtheir removal from the inner tubes; one that may be operated manually,at least by'preference, and is accurate and reliable in service.

An embodiment of the inventionis, illustrated in the accompanyingdrawing, in

which: Fig. 1 is a plan view of the tool, showing in solid lines theposition of the arms with a straight valvestem ready to be bent, and indotted lines the position ofthe parts'after the valve stem has beenbent, the inner tube being omitted for the sake of clearness;

' Fig. 2 isa' cross section through "the tool on the line 2'2, Fig. 1;Fig. 3 is a plan view of a modification; Fig. 1 is a plan view of ausual form of straight valve stem, showingone of its two slabbed faces.

, As shown in the drawing, the. tool comon the arm 1.

prises a pair trams 1 and 2, .whiclrfare pivoted or fulcrumed,asindicated at 8, the

remote ends of the arms being free for.

manual manipulation. Onthe arm 1, in one direction; from the pivot orfulcrum pin 3,

is located a lug or pin a, projecting laterally. therefrom. .A similar,upstanding lug or pin 51s fixed. to the arm 2,in a direction oppositefrom thefulcrum 3. That is to say, the pivot or. fulcrum pin 3 isnearerthe free ends of the arms 1 and2 than the lug 4, but farther thanthe second lug 5 These lugs are preferably, but not necessarily,rounded, as shown,

and may befiXed to thearms in any suitable manner. Of course, ifdesired, the'lugsi and 5 may be 1n the to'rmof rolls. On the arm 1,"adjacentthe pivot 3, is located a lug or arbor 6,.preferably having acurved face 7 approximating the bend that is to be made in thevalvestem. This arbor lug may befixed in any suitable manner to the arm 1. pj Means are preferably provided to limit or stop the approach ofthe armsland 2. Any

drawing, in Figs. 1 and 3, respectively, two

forms of a stop are disclosed.

Referring' for the present to Fig. 1, the

arm lis shown provided with a projection .or offset 8, and the arm 2with a plate 9, pro

vided with slots 10 and 11, the former of which embracesthe lug .5, andthe latter of which encloses the shank of a bolt 12, between the head 13of which bolt and a washer 14i, is confined a springflS under tensionand 7 thereby frictionally holding the plate 9 in any usted position].'When the plate!) has been shifted as far in one. direction as the slots10 and 11 permit, one of the abutment faces 16 is presented forcooperation with the offset 8, and when the plated) is moved to thesuitable devices may be employed. In the opposite eXtr-emefihefotherofthe faces 16 is presented forcooperation with the portion 8 r In Fig.3. of the drawing, another and simpler construction or stopillustrated.- 9

'me'ntbetween the flat side face 26 As seen by a scrutiny of this figureof the drawing, it comprises a plate 20, fulcrumed about the axis of thescrew 21, between the head of which screw and the plate 20 is interposeda spring or friction washer 22. The plate 20 may be moved in eitherdirection about its fulcrum pin 21 soas to locate its nose 23 in eitherof the positions indicated in Fig. 3 and in the path of the other arm,such location being determined by the position of the pins 24 and 25,flanking the plate 20. In this. modified form of construction, as in theother, the tool is adapted to bend either of the two sizes or types ofvalve stems that are in general use at the present time.

Obviously, the principle of 'the'sestop'slimiting movement of the arms 1and 2 toward each other might be extended to permit of stopping themovements ofthe arms in any number of desired positionsrelative one toanother; N I

The inanner of using the device-is obvious from the drawing. 7 V

H The tool of the present invention is intended for bending valve stemswhich have been previously reduced intermediately by 'machining oil thecentral portionxof their I threads, as indicated in the drawing, or areprovided with threads only in the irmnediate' vicinity of the junctionof the valve stem'with' the inner tube. Usually, the valve stems arelengthwise slabbed off to form a pair of oppositely disposed flat faces26.

between the lugs 4: and 6 and positioned so that the peripheral face ofthe lug 4 engages the flat face 26 of the threaded shank of the valvestem and the planular side 6' of the lug 6'" engages the inclinedshoulder 5' of the valve stem. The rounded extremity of I valve as shownin Fig. 1; 'As'the 'arms'l and 2 are brought together, the lug 5 bendsthe reduced intermediate portion of the valve stemaroun'd theroundedextremity 7 of the lug'26. During this bending operation the planularface'6' of the lug6 secures the valve stem against axial movementand'the engageand the lug lprevents the valve stem from rotating. Withthe above construction, the threads of the valve stem are protectedduring the bendin'g'operation and the outer part'of the valve stem isbent in a predetermined direction with respect tothe flat side faces on"the respectively opposite sides "of the valve stem.

It will be understood that the invention is capable of applicationinwide'varietyof form's other than those disclosedin the drawing and thatit is not intended'to be limited 'one' 'side' so as to bend Inoperation, the valve stem is inserted to details hereinbefore describedand illustrated. Reference should therefore be made to the accompanyingclaims for an understanding of the scope of the invention.

Having thus described my invention, What I claim and desire to protectby Letters Patent is:

1. In a tool for bending threaded valve stems which have a longitudinalfiat side face and a peripheral shoulder, a pair of pivotally connectedarms, a pair of lugs on one of said arm's,one having a flat side forengaging said shoulder at a' point opposite'fro'm said fiat face and arounded extremity for engaging the intermediate portion of said valvestem, the other'lu'g having a side arranged for re ceiving said flatface, and means on the other arm for engaging said valve stem only onone side soasto bend the latter upon said rounded extremity.

l 2. In a toolfor bendiiig fthrea ded valve stems which have alongitudinal fiat face and a peripheral shoulder inclined with respecttosaid flat face, 'a pair 0f pivotally connected arms, a pair "of lugs on"one of said arms,'one lug having "an. edge for receiving: said fiatface, the other'lug having a flat 'side' inclined with respect tosaid'edge and having'a rounded extremity forgengaging the intermediateportion olfsai d valve stem, and means on the other arm for engagingsaid 'valve stem on the latteruponis'aid rounded extremity, 7

3 In a tool" for bending threaded valve 'stems'which have a longitudinalflat side face I and a peripheral shoulder, a pairofpivotalyconn'ect'ed' arms,fa pa r of lugs on oneof said arms, onelughinting a flat side for en'- gaging saidshoulder at a'p'oint oppositefrom engaging the intermediate portion of said "valve stem,the"other"lug havi'nga sidearranged for rec'eivingsaid flatfac'e, andmeans stem-s0 asto bendfthe 'ed extremity. e

' i. The method of bending a 'tire valve stem having a threadedshan'k"portion provided wlth longitudinal,"opposite flat facesfa relatter uponsaid roundducedportionand a shoulder at the junction of said portions,saidmethod comprising d-isp sing Said shank portion between a pair ofaws, engaging the shoulder on the valve stem to secure it against axialmovement in said fl'at "face and a rounded extremityfor one direction,engaging the valve stem at a location spaced from the shank portion andapplying forceto the valve stem atsaidlocation to bend thevalve stemaround the shoulder-engaging point as afulcr'umng' I 5. Themethod'ofbendingatire valve ste havinga threaded shank portion previdedwith longitudinal,"opposite fiat races a reducedportion and a taperedshoulder between said portions, said method compri s'ingengaging saidshank portion at its fiat sides to prevent rotational movement of thevalve stem about its axis, engaging the tapered shoulder on the valvestem to secure the valve I stem against axial movement in one direction,engaging the valve stem at a location spaced from the shank portionbeyond the tapered shoulder and'applying force to the valve stem at saidlocation to bend it around the shoulder-engaging point as a fulcrum.

CARLBREER.

